P-chiral phospholanes and phosphocyclic compounds and their use in asymmetric catalytic reactions
申请人:The Penn State Research Foundation
公开号:US20040229846A1
公开(公告)日:2004-11-18
Chiral ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes according to the present invention are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition; epoxidation, kinetic resolution and [m+n] cycloaddition. Processes for the preparation of the ligands are also described.
31P chemical shifts and31P—−13C coupling effects in the stereochemical analysis of benzo-7-phosphanorbornene derivatives
作者:Louis D. Quin、F. Christian Bernhardt
DOI:10.1002/mrc.1260231110
日期:1985.11
The first phosphines based on the benzo‐7‐phosphanorbornene system have been prepared and found to have extremely deshielded 31P nuclei. The phosphine with a P‐tert‐butyl group gives the most downfield value (δ +152.5) ever recorded for a tertiary phosphine. The lone‐pair orientation in phosphines controls the magnitude of 2J (PC) and 3J (PC), and these effects were used to determine stereochemical
[EN] P-CHIRAL PHOSPHOLANES AND PHOSPHOCYCLIC COMPOUNDS AND THEIR USE IN ASYMMETRIC CATALYTIC REACTIONS<br/>[FR] PHOSPHOLANES P-CHIRAUX ET COMPOSES PHOSPHOCYCLIQUES, ET LEUR UTILISATION DANS DES REACTIONS CATALYTIQUES ASYMETRIQUES
申请人:PENN STATE RES FOUND
公开号:WO2005117907A2
公开(公告)日:2005-12-15
Chiral ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes according to the present invention are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition; epoxidation, kinetic resolution and [m+n] cycloaddition. Processes for the preparation of the ligands are also described.